Multifunctional anti-seismic prefabricated combined stair

The utility model relates to the technical field of combined stairs, and discloses a multifunctional anti-seismic prefabricated combined stair which comprises a prefabricated stair body, two sets of cavities are formed in the upper surface of the prefabricated stair body, two sets of sliding grooves are formed in the inner wall of each set of cavity, and a sliding block is jointly connected into each set of sliding grooves in a sliding mode. Fastening springs are fixedly installed on the side faces, away from each other, of each set of sliding blocks, two connecting columns are fixedly installed on the side faces, close to each other, of each set of sliding blocks, and clamping blocks are fixedly connected to the side faces, close to each other, of every two sets of connecting columns. Through the cavities, the sliding grooves, the sliding blocks, the connecting columns, the clamping blocks and the fastening springs, the function of clamping the step plates in the cavities is achieved, the step plates can be